normal stress due to longitudinal bending moment

例句：

1. 1.The beam is under normal stress due to the weight of the load.
   由于负载的重量，梁处于正常应力状态。
2. 2.The material has a normal stress of 300 MPa at the point of impact.
   该材料在冲击点处的正常应力为300 MPa。
3. 3.The structure is designed to withstand normal stresses and environmental conditions.
   该结构设计用于承受正常应力和环境条件。